17746 Views Updated 9 November 2026

LA 8637 S3 Knorr-Bremse Compatible Air Processing Unit Repair Kit

301.03.0070.05

Summary

This air processing unit repair kit is designed for the in-place overhaul of air treatment units within heavy commercial vehicle brake systems. It is compatible with Knorr-Bremse systems to ensure reliable air regulation and distribution. Equivalent to OE Knorr-Bremse LA8637S3.

Product identifiers
EAN Code	8683457012530

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Compatible OEM Codes

KNORR-BREMSE
- RPLA2100 S3
- LA 8646 S3
- LA 8645 S3
- LA 8644 S3
- LA 8643 S3
- LA 8642 S3
- LA 8641 S3
- LA 8640 S3
- LA 8639 S3
- LA 8638 S3
- LA 8637 S3
- LA 8636 S3
- LA 8635 S3
- LA 8627 S3
- LA 8625 S3
- LA 8617 S3
- LA 8610 S3
- LA 8609 S3
- LA 8608 S3
- LA 8607 S3
- LA 8606 S3
- LA 8605 S3
- LA 8600 S3
- K116880N50 S3
- K116879N52 S3
- K116879N50 S3
- K116878N52 S3
- K116878N50 S3
- K116877N52 S3
- K116877N50 S3
- K116876N52 S3
- K116876N50 S3
- K116875N52 S3
- K116875N50 S3
- K116874N52 S3
- K116874N50 S3
- K116873N52 S3
- K116873N50 S3
- K116872N52 S3
- K116872N50 S3
- K116871N52 S3
- K116871N50 S3
- K116870N52 S3
- K116870N50 S3
- K116869N52 S3
- K116869N50 S3
- K044300N50 S3
- K044300N03 S3
- K044300 S3
- K043684N50 S3
- K040608N50 S3
- K040607N50 S3
- K040607N03 S3
- K040607 S3
- K040606N50 S3
- K040606N03 S3
- K040605N50 S3
- K040605N03 S3
- K040604N50 S3
- K040604N03 S3
- K040604 S3
- K039120N50 S3
- K039120N03 S3
- II38617FN00 S3
- II38617FM5 S3
- II38617F S3
- II38610FM5 S3
- II38610F S3
- 484460186000 S3
- 286370 S3
- 274746 S3
- 1100586000R S3
- 1100586000 S3

Description

What does an air processing unit repair kit do?

An air processing unit repair kit is a service set for the in-place overhaul of the unit that dries, regulates, and distributes compressed air within a heavy commercial vehicle's air brake system. This kit provides a cost-effective alternative to full component replacement by renewing heavily loaded internal elements.

Compatibility and system application

These kits are compatible with Knorr-Bremse systems. They are essential for maintaining the integrity of the pneumatic circuit, ensuring that moisture and contaminants do not compromise braking performance. By utilizing these service sets, workshop technicians can restore the precise pressure regulation required for safe heavy-duty operations.

Installation and maintenance guidance

When performing an overhaul, it is critical to ensure surface cleanliness and use the correct lubricant during assembly. For optimal results, technicians should follow specific tightening torques as specified in the vehicle manufacturer's service manual. Proper installation ensures the longevity of the seals and mechanical components within the unit.

Troubleshooting and selection

Whether addressing pressure regulator drift or moisture accumulation in the dryer section, selecting the correct service kit is vital for system reliability. Always verify that all sealing elements and valve parts match the specific requirements of the installed unit.

OE cross-reference

301.03.0070.05 (Air Processing Unit Repair Kit) is the equivalent of the Knorr-Bremse OE number. This part directly replaces Knorr-Bremse OE number LA8637S3.